Engine-cooling system



Oct. 16,1928.

H. C. MALLORY ENGINE COOLING SYSTEM Filed Oct. 30. 1922 INVENTOk flan/y K yaw/1 Patented Oct. 16, 192 8.

: HARRY c; MALL RY,

or nn'w YORK, N. Y. see. It. 1ii rLIJo1 LY isms-ism SAID HARRYC; MATLLORY; nscnasnn niver-iv' n ooomim SYSTEM.

Application filedxoctober so, .1922. sm i No: 597-3439.

cooling space or spaces is normally utilized in vaporizing the coolingliquidand is dis sipated in a condenser in which the vapor is condensed, andwhichsystem preferably comprises provisions for keeping the system sufiicie'ntly free: from'airso that a pressure less than that of the atmosphere may be maintained i11 the coolingsystem, and" the boiling point of the cooling liquid may be correspondingly low. My invention com} prises means directly responsive to tlietem 'perature or to the va'por pressure in the cooling system, for regulating the flow of the wateror other condenser cooling fluid through the cooling space of the condenser which Iemploy to condense the vaporsof the engine coolingliquid' generated by the heat absorbed in the engine cooling space or spaces; Adva'nt'ageously the cooling system is ofsueli character that the' liquid or eondensation formed inthe condensingspaceoi".

the condenser is returned 'toth'e engine cooling space or spaces.

The various features of novelty whi'ch characterize my invention are pointed out withparticularity'in the claims annexed to and forming apart of this .spe'cificatiena For a' better understanding ofthe invention, however, its advantages and specific objects attained with its use, refereiice should-be haul to the accompanyingdrawings and de:

. script'ive matter in which I have illustrated and described-a preferred"embodiment of my invention.

The one figure of the" drawing 1s' a 'diagrammatic elevation with parts broken away and in section.

In the embodiment of my invention illus' trated, by way 01: example, in the drawing, A represents an internal combustion engine,

the cylinders A of whichare surrounded by" a liquid containing cooling jacket space A with an outletA at its 'topfrom which vapor may pass through the vapor pipe B to the steam inlet of a condenser C. The condenser (l, as conventionally illustrated, isa surface 1 condenser with, an in'tertii be steam. space -Gf traversed by tubes which open at their ends into chambers viii-the end headsof the condenser. One end hea'd of the condenser is formed with two chambers G and CQ'so arrangedthat cooling watersupplied to the chamber Cflpasses from the latter through approxii'nately halfof the tubes of the con-' denser into 7 the chamber (1 at the opposite end of thecondenser and returns from there through the other condenser into the chamber; from which it passes tO WaStQ f'OI? a suitable storage space (not shown) through a waste pipe i a I Water or other condenser coolingfluid. is supplied to the chamber C at; the required rate; by suitable means r'esponsive to conditions in the engine cooling system. The

means i for this purpose illustrated, comprise a reciprocating-steamjpump De, having its water cylinder outlet connected to the chamber G and having its steam cylinder receiving steam thro ugh a steam supply pipe E at. a-ra te determined by the adjustment of a valve F. 1 The latter as shown is thermo statically operated andgopens andcloses as the pressure risesand falls in-a pressure fluid pressure motor chamber F '7 one wall of which 5 is formed by- .a' flexible diaphragm to which the Qperating stem of the valve 1E is connectedi The pressure in the chamber F- varies? directly in-the arrangement ,illuSP tr-ated, with the vaportemperature in the engine cooling system; For tlij-is -purpose I provide aire'cepta'cle located in' thevapor;

ill)- pipe B and connected tqthepressurermotor chamber F by. a'pipe G leading; from the. bottom oif the receptacle" The chamber F and the pipe G1 jare filled, and-the re= ceptacle G is partly filledby a suitable volatile; liquid. inden such-conditions. that the pressure of the; vapor in the receptacle will va-ry and thereby produceopeningiand closing .movements of the valve F when the temperature to which the container G-is sub jeoted; rises; above 7 orfalls below a predetermined val-ue. p j p The effect o'f opening and closingthe-valve: F is; to increase and decrease the rate at: which the cooling liquidis"forced through. the; tubes ofithe condenser C, .andjthereby to increase; and decrease the condensing-effect of the condenser. An increase in the rate at which the cooling liquid is supplied to the condenser C. by the pump D, thus tends to reduce the temperature of the vapors sweeping past thecontainer G, while a reduction in the rate of'fiow of the cooling liquid through the tubes of the condenser tends to increase the temperature of the vapor.

WVith properly designed and proportioned apparatus of the type illustrated, it is readily possible to maintain an approximately con- A the cooling space A may be made whatever is desired. For example, if theliquid in the thermostatic system is water, by suitably exhausting air from the system before scal ing it from the atmosphere the pressure which the thermostatic mechanism tends to,

maintain, may readily be made 140 F., 160 F, 190 F. or any other temperature desired. The temperature which it is de-' sir'able' to maintain in the cooling space of any particular engines varies with the type of engine and the conditions' of use, but usually this temperature will be above 1O F., and will be appreciably below 212 F.

' The water of condensation formed in the condenser and the air initially contained therein or leaking into the cooling system may be withdrawn by any usual or suitable means. 'As shown I withdraw both the liquid of condensation and the air by a common pump'H ofthe wet air pump type, which discharges into a tank or reservoir I from which the water may be returned to the cooling space A as required. As shown the reservoir I is open to the atmosphere for the escape of the air discharged by the pump H, and is provided with fa water sealed liquid return pipe connection J to the engine cooling space A. Flow from the reservoir'I'to the engine cooling space may be controlled by any suitable provisions, such as the conventionally illustrated float valve L, so as to-maintain the desired height of liquid level in the space A. I-represents a make-up water supply connection through which engine cooling liquid may be supplied to the cooling system from time to time to make up for losses due to evaporation in the reservoir I and leakage. r J I Thoseskilled in the art will understand that with the described arrangement, the temperature in theengine cooling space can be maintained approximately constant under widelyi'varying conditions of operation. As thefengine load and the quantity of heat absorbed 'in the cooling space increases, the

initial temperature in the cooling system tends to increase, but any such increase in temperature acts to immediately increase the supply of steam to the pump D. and hence to increase the rate at which cooling liquid is passed through the tubes of the condenser Qthereby increasing the condensing capacity of the latter and restoring the normal .vapor temperature in the cooling system. Conversely when the load on the engine andthereby the rate of heat absorption in the cooling space is reduced, the supply ofcooling liquid to the condenser is reduced thus preventing the decreased latent heat absorption in the cooling space from resultingin a corresponding reduction in cooling system temperature While in accordance with the provisions of the statutes I. have, illustrated and described the best forms of my present invention now known to me, it will be apparent to those skilled in the art that changes may be made in the form of my invention without departing from the spirit of my invention as set forth in the appended claims, and that certain features of my invention may sometimes be used-to advantage without a corresponding use ofother features. i I Havingnow described myv invention, what I claim asnew and desireto secureby:

Letters Patent, ,is:

1 1. An engine cooling system of the boiling and condensing type comprising a cooling jacket surrounding the engines and having a vapor space at the top thereof, a condenser connected to said vapor space for condensing vapors formed by the absorption of heat by a cooling liquid contained in said jacket, means forsupplying a cooling liquid to said condenser, and means for regulating the supply of said condenser cooling liquidin accordance with the temperature in said jacket. I 1 2. An engine cooling system of the boiling and condensing type comprising a cooling jacket surrounding the engine and having a vapor space at the top thereof, a condenser.

connected to said vapor spacefor condensing Vapors formed by the absorption of heat by a cooling liquid contained in said jacket,

means for'supplying a cooling liquid to said condenser, means for withdrawing air and liquid of condensation from said condenser,

means for supplying a cooling .liquid to said jacket connected to said last mentioned means, and thermostatic means for regulating'fthe supplyof said condenser. cooling liquid in accordance with the temperature in said jacket. i

Signed at New York, in the county of New York: and State of New York, this 24th day. of October, A. D. 1922.

- HARRY C. MALLORY. 

